According to scientific results, on Winter solstice, a right angle is formed by the sun and the tropic of carpricorn.

根据科学的结果，在冬至，太阳和南回归线形成了一个直角。

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The hot sun is shining right overhead.

烈日当头照。

《新英汉大辞典》

They just bounce back white light for the sun, right to your eyes.

它们只是把太阳里的白光反弹，以进入你的眼睛。

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When the sun is just right, rainbows of color dance in the air.

VOA: special.2009.05.25

Some of them are substantial in size but it's almost impossible to see them in the forest because they only become visible when the sun is at the right angle.

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Generally, right after the sun sets we sort of lay our heads down on the pillow.

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My personal experience--and I don't have the science behind it to back it--is that people start to get more depressed right after the sun starts to come up for longer periods of time.

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